Boring and turning mill



(No Model.)

E.D. MAOKINTOSH. BORING AND TURNING MILL.

No. 440,319.. Patented Nov. 11, 1890.

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UNITED STATES PATENT OFF-ion.

EDXVARD D. MAOKINTOSH, OF BROOKLYN, NE\V YORK.

BORING AND TURNING MILL.

SPEGIFIGATIO liforming part of Letters Patent No. 440,319, datedNovember 11, 1890.

Application filed July 24, 1890.

To aZZ whom it may concern:

Be it known that I, EDWARD D. MAOKIN- TOSH, of Brooklyn, in the countyof Kings and State of New York, have invented certain new and usefulImprovements in Boring and Turning Mills, of which the following is adescription, reference being had to the accompanying drawings, formingpart of this specification, and to the letters of reference markedthereon, in which- Figure 1 is a perspective View of a boring andturning mill with my invention applied to it. Fig. 2 is an enlargedfront view, of a part of the same. Fig. 3 is a side view, partly insection, of the parts shown in Fig. 2. Fig. 4 is a bottom view of someof the parts shown in Fig. 2.

Like letters of reference indicate the same parts in the several views.

The form of machine known as a boring and turning mill, and to which myinvention has reference, consists, essentially, of the foling parts:

' A rotatable horizontal table A, to which is fastened the work to beturned or bored, a horizontal beam B over the table, two slides O and O,movable longitudinally on the beam, two guideways D and D, pivoted tothe slides O and O in such a way as to be capable of being turned in aplane common to both and perpendicular to the surface of the table, andof being temporarily fastened to the slides O and C after being soturned, and two toolbars E and E, movable longitudinally in theguideways D and D, and provided with means for holding tools, such as atF. Means are also ordinarily provided for temporarily fixing either orboth of the slides O and O to the beam B, for moving them longitudinallythereon, for temporarily fixing either tool-bar in its guideway, and formoving the tool-bars longitudinally in their guideways. As such meansare well known and form no part of my invention, I do not show ordescribe them.

The object of pivoting and temporarily fastening the guideways D and Dto the slides O and O is to enable the guideways D and D to be set toguide the tool bars E and E obliquely to the surface of the table, so asto enable conical work to be turned as the tool-bars and tools are movedtoward or from the table; but it has been found that when Serial No.359,761- (No model.)

the altitude of the cone is very small as compared with its base that itbecomes impracticable to incline the tool-bars sufficiently.

My invention has for its object the turning of such cones ofcomparatively small altitude; and it consists of a guide G fastened to'one tool-bar E and engaging with the other toolbar E in such a mannerthat as the latter is moved toward or from the former it will besimultaneously moved toward or from the table A. I prefer to constructthe guide G in the form of a channeled bar to fasten it to the tool-barE at right angles to the latter, and by such means as may be providedfor fastening the tools to fit a block H to the channel in the guide G,and to attach the block H loosely to the tool-bar E by means of apivot-screw I. It is evident, however, that the block Hmightbe dispensedwith and the pivot I might engage directly with a narrower channel inthe guide G; orthe guide G might be made in the form of a plain bar andarranged to engage with a channel in the block H. A brace K may beemployed to secure additional strength.

Such being the construction of my invention, the operation is asfollows: The toolbar E and guideway D are set obliquely to the table andtemporarily fixed with relation to the slide 0, the slide 0 being, also,temporarily fixed to the beam B, all by the ordinarymeans provided onboring and turning mills as usually constructed. The guide G, attachedto the bar E, thus becomes a fixture inclined to the table A. The slide0 is then moved longitudinally on the beam B, carrying with it theguidewayD' and the toolbar E. The latter is allowed to move freely inits guideway D, as together with its attached block H, it is raised orlowered by the block H traversing the inclined fixed guide G. Supposingthe parts to be set as shown in Fig. 1, the table A to be revolving, andthe slide 0, with the guideway D and tool-bar E, to be moving inwardtoward the center of the table A, it is evident that the tool-bar Ewould be forced to move downward simultaneously with its inward motion,and that if the tool F were operating on a piece of work fastened to thetable A that a conical depression would be formed in the work. The

reverse of this shape could beformed by in clining the tool-bar E andguide G in the opposite direction.

In order to operate on work of different heights above the table or toset the tool to proper depth of cut, it is only necessary to loosen thetool-bar E in its guideway D, adjust it to the proper height, and secureit again, all by the means provided on boring and turning mills asusually constructed.

Having now described my invention, what I claim as new, and desire tosecure by Letters Patent, is-

of the table, a guide fixed to one of the bars and engaging with theother, and two guide- Ways pivoted to two slides so as to turn in aplane common to both and perpendicular to the surface of the table, oneor both of the slides movable in a direction parallel with the surfaceof the table, substantially as described, and for the purpose specified.

3. In combination, a revolving table, two bars movable in guideways indirections either perpendicular or oblique to the surface of the table,a guide fixed to one of the bars and engaging with the other, twoguideways pivoted to two slides so as to turn in aplane common to bothand perpendicular to the surface of the table, one or both of the slidesmovable in a direction parallel with the surface of the table, and abeam supporting and guiding the two slides, substantially as described,and for the purpose specified.

EDWARD D. MAGKINTOSH.

\Vitnesses:

WM. BRENDLIN, CARL SCHLEUNING.

